{Reference Type}: Journal Article {Title}: Inverse opal spheres based on polyionic liquids as functional microspheres with tunable optical properties and molecular recognition capabilities. {Author}: Cui J;Zhu W;Gao N;Li J;Yang H;Jiang Y;Seidel P;Ravoo BJ;Li G; {Journal}: Angew Chem Int Ed Engl {Volume}: 53 {Issue}: 15 {Year}: Apr 2014 7 {Factor}: 16.823 {DOI}: 10.1002/anie.201308959 {Abstract}: Based on the combination of the unique features of both polyionic liquids and spherical colloidal crystals, a new class of inverse opaline spheres with a series of distinct properties was fabricated. It was found that such photonic spheres could not only be used as stimuli-responsive photonic microgels, but also serve as multifunctional microspheres that mimic the main characteristics of conventional molecules, including intrinsic optical properties, specific molecular recognition, reactivity and derivatization, and anisotropy.